Rendering - set rendering optionsSYNOPSIS
Rendering ( 0 | 1 ) ( 0 | 1 ) ( 0 | 1 )
( 0 | 1 ) ( 0 | 1 ) ( 0 | 1 ) ( 0 | 1 ) ( 0 | 1 )
DESCRIPTIONSet some rendering options. Depending on the output device, some options may always be enabled, no matter whether they are switched on or off by this command. Some of these options (like two-sided lighting) are also used to generate plots, so the appropriate options have to be set before giving the plotting command.
The following options are supported:
Anti Aliasing: Draw smooth lines. This may not
be supported on all hardware.
Transparency: Use transparent drawing for objects
that are not completely opaque. This may not
be supported on all hardware.
Fast Spheres Drawing: Instead of approximating
spheres with many polygons, they are drawn
as circles. This makes shading impossible,
but can make the display much faster.
Backface Elimination: Eliminate polygons that
face away from the viewpoint at an early
display step. This has normally no visual
effect on the display, but can make it
faster.
Shading: Color polygons depending on the angle
from the light source and the view point.
This is also necessary for the support of
depth cueing on most devices, e. g. for
plotting.
Two-sided Lighting: Normally lighting calculations
are only done for the "outside" of an object.
This triggers lighting calculation to be done
for both sides. The effect is visible if
objects are cut, mostly by the front clipping
plane. It is not switched on by default on
most devices because it can make all rendering
slower.
Depth Sorting: Sort all display elements by depth
before drawing. This gives a quick, but
sometimes unexact, method for hidden surface
elimination.
Hidden Surface Elimination: Eliminate display
elements that are hidden by other elements
closer to the viewpoint. If the hardware
supports this feature, it is enabled by
default. If it has to be emulated by the
program, the display can get very slow.
EXAMPLE
Rendering 0 0 0 1 1 0 1 0SEE ALSO
DATE
960305